Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 177 insertions, 0 deletions

diff --git a/REORG.TODO/time/era.c b/REORG.TODO/time/era.c
new file mode 100644
index 0000000000..b5743c621a
--- /dev/null
+++ b/REORG.TODO/time/era.c
@@ -0,0 +1,177 @@
+/* Helper functions used by strftime/strptime to handle locale-specific "eras".
+   Copyright (C) 1995-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "../locale/localeinfo.h"
+#include <libc-lock.h>
+#include <stdlib.h>
+#include <wchar.h>
+#include <string.h>
+#include <stdint.h>
+
+/* Some of the functions here must not be used while setlocale is called.  */
+__libc_rwlock_define (extern, __libc_setlocale_lock attribute_hidden)
+
+#define CURRENT(item)		(current->values[_NL_ITEM_INDEX (item)].string)
+#define CURRENT_WORD(item)	(current->values[_NL_ITEM_INDEX (item)].word)
+
+#define ERA_DATE_CMP(a, b) \
+  (a[0] < b[0] || (a[0] == b[0] && (a[1] < b[1]				      \
+				    || (a[1] == b[1] && a[2] <= b[2]))))
+
+/* Look up the era information in CURRENT's locale strings and
+   cache it in CURRENT->private.  */
+static void internal_function
+_nl_init_era_entries (struct __locale_data *current)
+{
+  size_t cnt;
+  struct lc_time_data *data;
+
+  /* Avoid touching CURRENT if there is no data at all, for _nl_C_LC_TIME.  */
+  if (CURRENT_WORD (_NL_TIME_ERA_NUM_ENTRIES) == 0)
+    return;
+
+  __libc_rwlock_wrlock (__libc_setlocale_lock);
+
+  if (current->private.time == NULL)
+    {
+      current->private.time = malloc (sizeof *current->private.time);
+      if (current->private.time == NULL)
+	goto out;
+      memset (current->private.time, 0, sizeof *current->private.time);
+      current->private.cleanup = &_nl_cleanup_time;
+    }
+  data = current->private.time;
+
+  if (! data->era_initialized)
+    {
+      size_t new_num_eras = CURRENT_WORD (_NL_TIME_ERA_NUM_ENTRIES);
+      if (new_num_eras == 0)
+	{
+	  if (data->eras != NULL)
+	    {
+	      free (data->eras);
+	      data->eras = NULL;
+	    }
+	}
+      else
+	{
+	  struct era_entry *new_eras = data->eras;
+
+	  if (data->num_eras != new_num_eras)
+	    new_eras =
+	      (struct era_entry *) realloc (data->eras,
+					    new_num_eras
+					    * sizeof (struct era_entry));
+	  if (new_eras == NULL)
+	    {
+	      free (data->eras);
+	      data->num_eras = 0;
+	      data->eras = NULL;
+	    }
+	  else
+	    {
+	      const char *ptr = CURRENT (_NL_TIME_ERA_ENTRIES);
+	      data->num_eras = new_num_eras;
+	      data->eras = new_eras;
+
+	      for (cnt = 0; cnt < new_num_eras; ++cnt)
+		{
+		  const char *base_ptr = ptr;
+		  memcpy ((void *) (new_eras + cnt), (const void *) ptr,
+			  sizeof (uint32_t) * 8);
+
+		  if (ERA_DATE_CMP(new_eras[cnt].start_date,
+				   new_eras[cnt].stop_date))
+		    if (new_eras[cnt].direction == (uint32_t) '+')
+		      new_eras[cnt].absolute_direction = 1;
+		    else
+		      new_eras[cnt].absolute_direction = -1;
+		  else
+		    if (new_eras[cnt].direction == (uint32_t) '+')
+		      new_eras[cnt].absolute_direction = -1;
+		    else
+		      new_eras[cnt].absolute_direction = 1;
+
+		  /* Skip numeric values.  */
+		  ptr += sizeof (uint32_t) * 8;
+
+		  /* Set and skip era name.  */
+		  new_eras[cnt].era_name = ptr;
+		  ptr = strchr (ptr, '\0') + 1;
+
+		  /* Set and skip era format.  */
+		  new_eras[cnt].era_format = ptr;
+		  ptr = strchr (ptr, '\0') + 1;
+
+		  ptr += 3 - (((ptr - (const char *) base_ptr) + 3) & 3);
+
+		  /* Set and skip wide era name.  */
+		  new_eras[cnt].era_wname = (wchar_t *) ptr;
+		  ptr = (char *) (__wcschr ((wchar_t *) ptr, L'\0') + 1);
+
+		  /* Set and skip wide era format.  */
+		  new_eras[cnt].era_wformat = (wchar_t *) ptr;
+		  ptr = (char *) (__wcschr ((wchar_t *) ptr, L'\0') + 1);
+		}
+	    }
+	}
+
+      data->era_initialized = 1;
+    }
+
+ out:
+  __libc_rwlock_unlock (__libc_setlocale_lock);
+}
+
+struct era_entry *
+internal_function
+_nl_get_era_entry (const struct tm *tp, struct __locale_data *current)
+{
+  if (current->private.time == NULL || !current->private.time->era_initialized)
+    _nl_init_era_entries (current);
+
+  if (current->private.time != NULL)
+    {
+      /* Now compare date with the available eras.  */
+      const int32_t tdate[3] = { tp->tm_year, tp->tm_mon, tp->tm_mday };
+      size_t cnt;
+      for (cnt = 0; cnt < current->private.time->num_eras; ++cnt)
+	if ((ERA_DATE_CMP (current->private.time->eras[cnt].start_date, tdate)
+	     && ERA_DATE_CMP (tdate,
+			      current->private.time->eras[cnt].stop_date))
+	    || (ERA_DATE_CMP (current->private.time->eras[cnt].stop_date,
+			      tdate)
+		&& ERA_DATE_CMP (tdate,
+				 current->private.time->eras[cnt].start_date)))
+	  return &current->private.time->eras[cnt];
+    }
+
+  return NULL;
+}
+
+
+struct era_entry *
+internal_function
+_nl_select_era_entry (int cnt, struct __locale_data *current)
+{
+  if (current->private.time == NULL || !current->private.time->era_initialized)
+    _nl_init_era_entries (current);
+
+  return (current->private.time == NULL
+	  ? NULL : &current->private.time->eras[cnt]);
+}